YZYBIO-B (02496): Mai Shanqi appointed as agent for service of process

YZYBIO-B (02496) announces that on September 18, 2026, the Stock Exchange confirmed that Mr. Zheng Jianhua (Mr. Zheng), the current joint company secretary, meets the requirements of Rule 3.28 and Rule 8.17 of the Listing Rules and may serve as the Company's company secretary after the expiry of the waiver on September 24, 2026. Accordingly, Ms. Lai Tian'en (Ms. Lai) will resign as joint company secretary with effect from September 30, 2026. Following Ms. Lai's resignation, Mr. Zheng will continue to serve as the Company's sole company secretary. Ms. Lai has resigned as the authorized representative of the Company for accepting service of legal process documents and notices in Hong Kong (agent for service of process) under Rule 19A.13(2) of the Listing Rules and Part 16 of the Companies Ordinance (Chapter 622 of the Laws of Hong Kong), with effect from September 30, 2026; and (ii) Ms. Mai Shanqi has been appointed as agent for service of process, with effect from September 30, 2026.